44 reviews
Size Chart
Jet Black
Knee warmers to winterise your baggies or lycra cycle shorts. Put them on in the cold. Peel 'em off and shove in your back pocket when your motor warms up.
  • Fast-drying, 4-way stretch Hot Shot™ Merino.
  • Gripper elastic at hem keeps them hitched up.
  • Hazard!™ reflective logos on each calf for night time visibility.
  • Designed & made by us in Aotearoa | New Zealand.

  Weight: 120 gm

+Hotshot™ lycra
4-way stretch winter luxury uniquely combines superfine NZ merino against your skin with a tightly woven, hardwearing nylon outer and lycra to stretch and move with your body. Warm as pie. Developed by Ground Effect and knitted just for us.
  • Composition: 38% merino; 46% nylon; 16% lycra.

Night travel is a spooky experience. Many Ground Effect garments feature our Hazard!™ reflective logo and piping to help remind traffic that we're on the road too.

+More than Kiwi Made
Ground Effect clothing is crafted right here in New Zealand. Has been ever since we started back in 1994. Manufacturing locally works for us. We operate a quick-response system - holding minimal stock of any one item, but churning out a few more quick-smart when the pile gets low. The upshot is that we are seldom caught with our shelves empty, so orders get despatched the same day you place them.


  • All Ground Effect clothing enjoys a warm 40ºC machine wash. Try to avoid cold-water detergents and those with bleach, 'oxygen whitener' or fabric softener.
    • The cold-water varieties have little enzymes that are super-charged to brave the cold but can damage technical fabrics and cause skin irritation. 
    • Bleach rots natural fibres like merino, strips the dye, attacks laminates of waterproof fabrics and can also cause skin irritation.
    • Sodium Percarbonate (the main ingredient in oxygen whitener) can make colours run.
    • Fabric softener and stuff containing it like wool wash destroys the water repellent finish on waterproof and water resistant fabrics, and can cause colours to run. 
  • As a rule of thumb, a product that is easy on the planet is also easy on your body. Select a mild plant-based soap like EcoverEcostoreEarthwise or Aware.
  • Hand washing is sometimes the only option on tour, but a washing machine rinses more thoroughly and is preferable if you have the choice.
  • Most Ground Effect gear dries super-fast so hanging on the line or drooping over the bedpost is generally the best option. High heat can damage some fabrics so if you do take your threads for a spin, set the device on 'medium' or 'warm' rather than hot. A lap in the dryer is recommended for your rain jacket, after it has dried on the line, as it helps recharge its water repellent finish. 

  • Wash colours separately.

+ Shipping
  • Items are generally packed and sent the same day your order is received.
  • Costs $7 by overnight courier within New Zealand.
  • NZ$7 by tracked airmail to Australia.
  • Around NZ$15-25 by tracked airmail to destinations elsewhere in the world - calculated in our shipping cart as you check out. 
    • More shipping and tax details in our FAQ.
    Customer Reviews
    4.9 Based on 44 reviews
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    Filter Reviews:
      Justin M.
      Australia Australia

      Perfect for early starts and hills descents during the nippy autumn mornings in Adelaide. I was a bit sceptical about the sizing but turned out to be spot on. I’m 172cm and Size S was just right. Great quality and fit.

      Danielle J.
      Australia Australia
      Very warm, almost full-length

      These are really quite warm, warmer than expected even. They are also longer than I had expected, and seem like a slightly shorter version of full-length warmers. Either way, I'm happy with them but only gave 4 stars because they are probably a little bit too warm for those days when you want something in between baggies and full-length.

      Warren N.
      New Zealand New Zealand

      I simply can't do this stuff short; they, like all my other Ground Effect bikiing gear,are so cool; werll warm actually. Didn't get them to go biking in, got them becasus I smashed my knees about and they work aching in the cold. Wear them to bed wear them with my shorts, wear them inside, wear them outdoors, only sorry I have to take them off to swim and shower; could live in them cheers Warren

      Mark F.
      New Zealand New Zealand
      Kneecaps Review

      This is my second pair and they are great, not only for keeping my knees warm on my bike but for keeping my legs warm when wearing a suit to work, which is standard work wear for me. And no-one knows :) Mark

      Robin F.
      New Zealand New Zealand
      Kneecaps review

      These Kneecaps are superb. Merino, they are light with the right amount of stretch and warmth, and they always stay up. Highly recommend them for walking on frosty mornings or biking in a chilly wind. The online purchase arrived the day after I ordered.